Last week October 10, 2017 Microsoft sent out the "October Monthly Rollup patch". This patch inadvertently broke the ODBC connections.
iDashboards Log Error: ErrorCode:-5016
The current fix seem to be to roll back the corresponding patch and reboot the server.
Windows 10: KB4041676
Server 2012 R2: KB4041693
Server 2008 R2: KB4041681
If you still have issues with this please open a case with iDashboards support and attach the most current version of the iDashboards.log file to the case.